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  2. Light-emitting diode - Wikipedia

    en.wikipedia.org/wiki/Light-emitting_diode

    In diffused lens LEDs, this circuit is visible as a small black dot. Most flashing LEDs emit light of one color, but more sophisticated devices can flash between multiple colors and even fade through a color sequence using RGB color mixing. Flashing SMD LEDs in the 0805 and other size formats have been available since early 2019. Flickering

  3. Sphero - Wikipedia

    en.wikipedia.org/wiki/Sphero

    These shells are very colorful, and come in white, blue, pink, green, and orange, as well as specialty designs such as a golf ball and a (very small) soccer ball. The Mini is the cheapest robot made by Sphero at US$49. The Mini has a new feature called Face Drive which lets the user drive the robot through the app with different head movements.

  4. Emergency vehicle lighting - Wikipedia

    en.wikipedia.org/wiki/Emergency_vehicle_lighting

    If a blue flashing light is seen in either traffic or the sea, other vehicles must yield to let that vehicle pass. Blue flashing lights are used by police, military police, customs, fire departments, rescue services, and ambulances. Government, VIP, and embassy vehicles may also use blue if accompanied by local police.

  5. Bisexual lighting - Wikipedia

    en.wikipedia.org/wiki/Bisexual_lighting

    Around 2017, left-wing YouTubers such as ContraPoints (who identified as bisexual at the time) began to light their videos with pink, purple, and blue neon lights. [10] The use of bisexual lighting became a popular meme in 2018, with multiple Twitter threads showcasing instances of the lighting scheme going viral, as well as photographs of ...